Y Block Question |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Posted: June-29-2011 at 1:32am |
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Pete the 312 block is a one off, as is the crank.The compression increase is a result of the shorter deck height, and increas in bore and stroke.
Also found there are as many hidden ponies in a 292 as in a 312, over bore to .125 safely......lets see what happens come winter, |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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[QUOTE=Riley] I guess the next one will be red.
QUOTE] |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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It appears there was a new short block purchased in 1964 for this boat, original motor puked #7 rod , damaging the alum. oil pan .There is a small repair on the flange. It is indeed a 312, w/ FoMoCo std. rods and mains. There were some issues, I was told, with the older castings, so maybe this unit being new in '64 could well be in that time frame.
There are only about 40 hours on this engine,very pleased with the power and performace the 215 hp provides. I am building a 292 to swap for the rest of the summer,this is a parts and pieces motor, a little time and we will see if it will live, This wooden boat stuff sometimes sucks,,,,,,,, |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Looking at the "Y" block manual, it does look like they lengthened the stroke on the 312 from the 292 by .14" but the bore as well. We'll see what Billy comes back with as far as the info on what he used for a crank. |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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You would think they would have all broke by now. I didn't realize 312's and 292's used the same cranks. Aren't the strokes different? |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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There are "Y"'s running with blowers without problems but, according to John, there was a era when Mercury {who was building the 292's at the time} did have casting problems. Billy correct me if I'm wrong but didn't you tell me you used a 292 crank that did come from the Mercury crank problem era? |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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I guess the next one will be red.
What would cause such a failure. Too much power for an old crank? |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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I just finished a very lengthy conversation with Billy. After he consulted with John Mummert who is without a doubt the Y block expert (75 years old and knows his stuff), we have all concluded it is defiantly the bad choice of paint. With the wrong color, and with even a small amount of UV light, there's a chemical reaction that sucks all the nickel and steel out of the castings. This even goes though the mains and into the crank. It's the steel and nickel content that gives a casting it's strength. What's left is basically carbon which is very brittle.
EDIT: |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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Ugh! What caused that? We ran ours hard yesterday for the first time and I had my fingers crossed the whole time hoping it was going to stay together. That sucks. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Got it! I have never heard of a history with "Y"'s breaking cranks. Have you? |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Pete, the main cap was removed to show the extent of the damage .
Bruce, the engine is a 312 in my Starflite. |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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What are these photos of?
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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I want to know what Billy did with the center main cap. I didn't see if he found it in the pan or not. It's got to be there!!! I can sure see why the crank snapped with it missing!
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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What color caused that? Hope it wasn't Dupli color.
Our Y block project has been on hold for the last 1 1/2 years, but we broke it out yesterday and it was running good. Those engines sound so good whether idling or cruising along. Ours was pushing the Classic 45.1 gps, which is a few mph faster than I expected. |
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uk 1979 part2
Groupie Joined: April-30-2011 Location: UK Status: Offline Points: 71 |
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Jeff, Fresh info from the Boat Dr, be careful as if the wrong pigment combo is used on a Y Blocks over time will weaken the metallurgy and course major failure but even with this damage was able to chug back 6 miles to the dock, always keep it original like Pete said
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lets have a go 2
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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I remember now. That's a great project. I'm looking forward to seeing more pictures as it progresses.
Did you use Dupli Color? |
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Inboard Fanatic
Newbie Joined: March-27-2011 Location: Texas Status: Offline Points: 29 |
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Actually it's a different make, I posted about it in the "off topic" section a few weeks ago, Glastron Saberflite. Jeff |
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Inboard Fanatic
Newbie Joined: March-27-2011 Location: Texas Status: Offline Points: 29 |
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Now that's some funny stuff right there! |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5781 |
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I don't care what color it is that is a very nice job of detailing. Your should be proud.
Pete, I painted the Hemi yesterday but I'm going to make you wait for pictures. |
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You can’t change the wind but you can adjust your sails
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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Our mustang came with an order sheet from interceptor that had different stuff you could order including a spray can of touch up paint. Somewhere there's a can sitting in someones garage...
Jeff, what year/model century? |
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uk1979
Platinum Member Joined: June-13-2007 Location: United Kingdom Status: Offline Points: 1423 |
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Real nice Job Jeff
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Lets have a go
56 Starflite 77 SN 78 SN 80 BFN |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Jeff, Pete is correct on this subject. The use of any other shade than OEM will cause problems.
I wonder if the poor fuel mileage could a result of the Alpine Green I used to paint mine.I will post pics later of internal damage also caused by " killer paint". Jeff beware of the Alpine Green, its only cheap when ya buy it.... |
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Inboard Fanatic
Newbie Joined: March-27-2011 Location: Texas Status: Offline Points: 29 |
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Thanks Riley, I think the debate over original color will rage on forever. I researched this site and others on correct color and found a multitude of answers, so I admit it, I took the easy way out. Now all I need is my hull back so I can put it back in. I'm afraid I may have made a mistake with the shop that has it, he has yet to start any body work. But yet I cannot imagine why, it was 111 degrees here today and his shop is not air-conditioned. Thanks again.
Jeff |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7954 |
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Jeff that thing looks fantastic. Great job right down the hose clamps. Iit looks every bit as good as the Hilpshes.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Jack, Then a PO has been in there before you!!!
Jack. You are not keeping it as original as I'd like you to be! You need to do more RESEARCH!! Did you even use the search feature on the site to see what the color should be?????? No one to date has come up with a "color number". In today's state of technology, it's not even needed!!! It's called "color scanning!! |
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Inboard Fanatic
Newbie Joined: March-27-2011 Location: Texas Status: Offline Points: 29 |
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Thanks for the comments. I agree Pete, the Alpine green did not match the original color that I bead blasted off. There does seem to be several variations of the original color out there on engines that supposedly have never been touched. On mine it was lighter with more blue in it, almost like sky blue with a hint of green. Anyway, mine has obviously been redone and the color works for me as far as an "off the shelf" paint goes. The decals did come from Steve Hilpisch, he also confirmed the air horn question for me.
Jeff |
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wingwrench
Senior Member Joined: December-11-2010 Location: Lakeland, FL Status: Offline Points: 155 |
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Looks great Jeff.
Pete, Alpine Green was a perfect match to the original color on my engine. I found 3 layers of greens when I bead blasted the engine, all different. I matched the first layer. If it isn't correct what is the correct color number? Jack |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Looks great Jeff nice job
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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J.
It looks great but I'm disappointed on the color. Reid got it the closest even though it could be a little darker - however, colors don't always come through correctly on the net. Did you get the decals from the Steve(s) Hilpisch's? Bruce and Steve, Alpine green is NOT correct!! |
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Inboard Fanatic
Newbie Joined: March-27-2011 Location: Texas Status: Offline Points: 29 |
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Yes, it is Alpine Green. Here are a few more pics, I went ahead and fabricated a bracket to hold the alternator like it is supposed to be. Maybe by next weekend I can get it off the lift and mount the bellhousing with the starter so I can get it running, getting anxious to hear it run.
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